Lopsided final boss explosions

From DoomWiki.org

When the final boss is vainquished, the A_BrainScream codepointer will create a series of explosions along the wall. The position of these explosions is hardcoded relatively to Romero's head: 320 map units south of the head, one explosion every 8 map units on a East-West line going from 196 units to the West to 320 units to the East, and with a random height between 128 and 640 (absolute values).

The lopsidedness comes from the fact the line goes from -196 to 320, putting the epicenter of the explosions 62 units to the East.

Since the effect is mostly cosmetic, this bug is seldom noticed. Among major source ports, only EDGE fixed it by changing the values from -280 to 280.